Top 100 Software Testing Companies in California
The Best of December 2025Looking for a top software QA company in California?
Hiring a software testing company is a necessity to both test and improve the services your company offers, especially in an increasingly digital world.
To assist you in your search for a partner, we’ve compiled this list of the top software testing companies in California. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best California Software QA Companies
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$5,000+50 - 249 employeesCluj-Napoca, RomaniaRead More
BetterQA is an Application Testing company. Their midsize team is located in Cluj-Napoca, Romania. Their services include Application Testing, other IT consulting and SI, and Application Management & Support. The company was launched in 2018.
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$5,000+50 - 249 employeesSeattle, WARead More
QA Wolf, an application testing company, was launched in 2019. The company provides application testing and has a small team.
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1$5,000+250 - 999 employeesMountain View, CARead More
PFLB specializes in performance testing services. We help companies find and resolve performance bottlenecks such as ill-performing API calls or slow database queries.
Clients choose us for their performance testing needs across various technologies, including web and mobile applications, core banking systems, SAP, IVR, and legacy software.
We provide support for JMeter and LoadRunner environments, offering a comprehensive range of solutions. Additionally, our load testing platform, PFLB, empowers companies to conduct efficient and scalable performance tests.
With over 15 years of industry experience, PFLB has established a strong reputation for delivering reliable performance testing solutions globally.
For more information, visit our website at pflb.us. We'd love to discuss how we can optimize your software's performance.
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SamsungIndustries
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2$50,000+1,000 - 9,999 employeesSan Francisco, CARead More
BairesDev is a San Francisco, California-based software development company. The large team offers Custom Software Development, Web Development, Mobile App Development, Artificial Intelligence, and more. The company was founded in 2009.
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GoogleIndustries
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3$50,000+50 - 249 employeesSan Francisco, CAAdmios, a software development firm, was launched in 2005. The company provides Custom Software Development, IT staff augmentation, IT managed services, Application Testing, and more and has a midsize team. The company is in San Francisco, California.Read More
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4$5,000+10 - 49 employeesSan Francisco, CARead More
Established in 2017, ShyftUp is a mobile & app marketing company. The small team specializes in mobile & app marketing. The firm is based in San Francisco, California.
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5Undisclosed2 - 9 employeesPenn Valley, CARead More
SP Marketplace is a software development company based in Penn Valley, Calif., with another office in Sacramento, Calif. Founded in 2012, SP Marketplace specializes in providing custom software development, application development, and application management services to IT companies and nonprofits.
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Coconino CountyIndustries
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6$10,000+2 - 9 employeesSan Jose, CAQuality Geek LLC, an user experience agency, was established in 2021. The company focuses on UX/UI Design, Application Testing, Web Development, E-Commerce Development, and more and has a small team. The company is headquartered in San Jose, California.Read More
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7$1,000+2 - 9 employeesSan Diego, CARead More
A digital marketing agency based in San Diego, Wolfhound Interactive was founded in 2003. Their team of fewer than 10 offers conversion optimization, PPC, UX/UI design, and digital strategy services. They serve small to midmarket businesses in industries such as e-commerce, advertising and marketing, and business services.
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Ford Sears California Chamber of Commerce Tektronix Massage Warehouse Greyhound Adoption Center Silvert’s Clothing Caltech Stanford To see Wolfhound Interactive's case studiesIndustries
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8$1,000+250 - 999 employeesSunnyvale, CAFounded in 2012, ThinkSys is a midsize custom software development firm. Their services include Custom Software Development, Web Development, Mobile App Development, Artificial Intelligence, and more. The agency is in Sunnyvale, California.Read More
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9$10,000+10 - 49 employeesSacramento, CARead More
Prestige Development Group is an IT staff augmentation company based in Sacramento, California. The small firm was launched in 2016. Their team specializes in IT staff augmentation, custom software development, mobile app development, and blockchain.
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Capital OneIndustries
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10Undisclosed1,000 - 9,999 employeesSanta Clara, CALaunched in 1997, Qualitest Group is a large Santa Clara, California-based Application Testing company. Their team offers Application Testing.Read More
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AdidasIndustries
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11$1,000+50 - 249 employeesFremont, CARead More
4 Way Technologies is an application development company. They offer mobile app development and were founded in 2012. Their midsize team is in Noida, India and Fremont, California.
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12$25,000+50 - 249 employeesNewark, CACalibraint Technologies is a Chennai, India-based blockchain company. The midsize team focuses on blockchain, custom software development, Artificial Intelligence, application management & support, and more and was launched in 2015.Read More
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13$25,000+250 - 999 employeesSan Jose, CARead More
VOLANSYS Technologies is a product realization and digital transformation company based in Ahmedabad, India, and founded in 2008. Their team of more than 350 employees specializes in IoT development, cloud consulting, and mobile app development.
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14$5,000+250 - 999 employeesSan Francisco, CACobalt is a San Francisco, California-based Cybersecurity and Application Testing company. Launched in 2013, the team offers Cybersecurity and Application Testing.Read More
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15$50,000+10 - 49 employeesLake Forest, CALaminar Consulting Services Inc. Is a small software development company. The Lake Forest, California-based company was founded in 2005. Their services include Custom Software Development, Application Testing, Enterprise App Modernization, cloud consulting & SI, and more.Read More
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ExemplisIndustries
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16$10,000+2 - 9 employeesBurbank, CARead More
Worklab.io, Inc. is a software agency founded in 2011 with no more than 10 members. They offer custom software, web, and mobile app development solutions from their office in Burbank, Calif. They work with small and mid-market firms in the field of business services.
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All State AssociationIndustries
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17$1,000+10 - 49 employeesSan Bernardino, CARead More
WordSphere WordPress Development Agency is a software development firm established in 2007. Their small team is headquartered in San Bernardino, California. The company focuses on custom software development, IT managed services, web design, wearable app development, and more.
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18$10,000+50 - 249 employeesFremont, CARead More
Agile Soft Systems, Inc, a custom software development firm, was launched in 2012. Their midsize team is headquartered in Fremont, California. Their services include custom software development, application testing, blockchain, enterprise app modernization, and more.
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19Undisclosed250 - 999 employeesMonrovia, CAParasoft is an Application Testing company. The Monrovia, California-based company specializes in Application Testing.Read More
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20Undisclosed250 - 999 employeesSan Francisco, CALambdaTest is an Application Testing company. In San Francisco, California and Noida, India, the company provides Application Testing and Generative AI.Read More
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21$1,000+10 - 49 employeesLaguna Beach, CARead More
Position1.com is a small digital marketing firm headquartered in Laguna Beach, Calif. Founded in 2017, their main focus lines are PPC, SEO, and web design.
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DesignerHardware.comIndustries
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22$1,000+2 - 9 employeesSan Diego, CARead More
Opel Labs is an application testing company. In San Diego, California, their small team specializes in application testing, IoT development, Artificial Intelligence, and custom software development. The agency was launched in 2020.
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23$1,000+50 - 249 employeesDublin, CAPCloudy, an Application Testing company, is in Dublin, California. Established in 2015, the team offers Application Testing.Read More
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24$1,000+50 - 249 employeesTorrance, CAQA Genesis is an Application Testing company established in 2014. Their services include Application Testing.Read More
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25$10,000+10 - 49 employeesPalo Alto, CARead More
OrbitLift is an e-commerce consulting company located in Palo Alto, Calif. with additional offices in London and Odessa, Ukraine. Founded in 2014, they currently employ a team of 4 that specialize in e-commerce development, web design, UX/UI design, and more.
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Men's Wearhouse, a chain of American's men dress clothes retailers in the United StatesIndustries
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26Undisclosed50 - 249 employeesWalnut, CAThought Frameworks, an Application Testing company, is located in Walnut, California and Bengaluru, India. Their services include Application Testing.Read More
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27$50,000+10 - 49 employeesSan Diego, CARead More
Odyssey Computing, Inc. Is a web design company headquartered in San Diego, California. The small agency was founded in 1996. Their services include web design, ux/ui design, custom software development, web development, and more.
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28$1,000+2 - 9 employeesLos Angeles, CARead More
QualiLogic, LLC is a web and mobile firm based in Northridge, Calif. with more than two employees. They have offered mobile app development, e-commerce development, and SEO solutions to small businesses in the fields of arts, consumer products, and more.
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Care Connectors Med GroupIndustries
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29$50,000+50 - 249 employeesSan Jose, CALaunched in 2016, Innoflexion Technologies is a midsize San Jose, California-based Application Testing company. Their services include Application Testing.Read More
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30$5,000+50 - 249 employeesGlendora, CAIn Glendora, California, 3Alica is a midsize data analytics company. They offer BI & big data consulting & SI, Custom Software Development, E-Commerce Development, Application Testing, and more and were established in 2010.Read More
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SberbankIndustries
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